I've stored my planes with equipment installed in an unheated garage for the last 30 years with absolutely no concern. Our winters here are variable, but it can get down to -10°F. Doesn't hurt the plane at all.
Heck, we even fly on New Years day at our club - if it isn't snowing too hard!
For winter storage, I remove the receiver battery, but I leave the servos and receiver installed. Drain the fuel tank. I would squirt some oil down the carb of the glow engine, flip it over a few times to distribute the oil, then seal the carb and the muffler with a "squeezy" earplug. Hang them from the ceiling, level.
An electric plane would need even less preparation.
These were all fairly large balsa/ply/Monocote .40 sized glow kit planes. No space inside.
Small electrics and foamies could stay in the workshop inside.
As long as the space is dry, I would not be concerned at all.
I have more concern about bringing a plane out of a dry, cool, air-conditioned basement into a 100°F, humid day. You get condensation on all the cool metal and plastic parts of the plane. I set them on the deck in the sun to warm up and dry out before going out to the field to fly.
Just my opinion.